<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<form action="upload.jsp" id="form1" name="form1" encType="multipart/form-data"  method="post" target="hidden_frame" >   
    <input type="file" id="file" name="file" style="width:450">   
    <INPUT type="submit" value="上传文件"><span id="msg"></span>   
    <br>   
    <font color="red">支持JPG,JPEG,GIF,BMP,SWF,RMVB,RM,AVI文件的上传</font>                 
    <iframe name='hidden_frame' id="hidden_frame" style='display:none'></iframe>   
</form>   
  
</body>   
</html>   
  
<script type="text/javascript">   

function callback(msg)   
{   
    document.getElementById("file").outerHTML = document.getElementById("file").outerHTML;   
    document.getElementById("msg").innerHTML = "<font color=red>"+msg+"</font>";   
}   
</script>  